Transmission-drum clamp



G. D. LAWSON. TRANSMISSION DRUM CLAMP.

APPLICATION FILED JAN- 31, 1920.

1,359,815. P tentedNov. 3,1920

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Many machine elements are madewlth has ob 'ecions a ne claims and illustrated bythe accompanying V and then rotate the drum by hand handles of convenient i sn onenp. Lawson, oFiwc iEQNT s, IO A";

p TRANSMISSION-DRUM CLAMP.

1',35e,e1 5. ,Specifiefiwlofmemes r te-eaten nomasiieeo;

Application filed' J'anuary e1, 192 0. Serial No. 355,481.."

5'0 all whom it may concern: c

Be it known that L GEORGE D. LAWsoN, a citizen of theUnited States oi -America, and resident of Pocahontas, Pocahontas county, Iowa, have invented a new and useful "transmission-Drun1-Clamp, of which the following is a specification. v

The object ci -this invention is to provide means for holding and spinning-an object to be reamed relative to a reaming tool.

A itirther object of this invention is to provide a clamp or wrench adapted to be engaged with and support an object to be reamed, which tool may bereedily' and con venientiy attached to and detached from said object. i

A further object o'i'ihis invention isto provide improved means for expanding and contracting annular 'clamp or wrench- My invention consists n the constrnction,v

z rangernent and. ina'tion'of elements reinaiter set 'L'orth pointed out in the drawing in which- 7 .7

" fFigure l is face view showing my device in position for practical use, dotted lines (heating expanded or open position oi the clamp relatiretotie object,

2 is an edge view of the same 35s a cross section on the indicated line bushings which are subject to war and abrasion requ ins' renewal; and it is mon practice to drive out the old hnsl and replace them with-new bushings r cut to fit the journal on which the elen H'US operate. Diflerent plans are employed for reaming the new bushings one such plan used greatly in autoniobile repair shops in respect of transmission drums tor Ford cars, is to lock reaming tool in a vise on the reaming tool until the bushing has been suiticiently ested. to fit its she owing to the shape of the drum injuring the h LCl of the operator 1 the inability of the operator to t the drum in its proper reiaticn realner= Tov avoid these objectie s produced a device or o l. arrange tote blamped on the rim of the transm ssion drum or other obiect with proaide; form and conveniently located, by the use of which an. o

may pass.

flanges.

i his plan ator may manipulate said object relative to a 'reamer with satisfactory results; The

same tool whenniade in different sizesinay be employed in handling a great variety-of objects such as a transmission triple gear asseinblyoi' a Fordcar. I v x In the construction of the device as shown the lnumeral 10 designates the object, in this'instance the reverse drumof a trans:

mission of a For-dear, which objectis' formed with an annularrim 11 and a bored hub containing a bushing- 12 adapted to -ber reamed. The .tool, involving iny invention is mounted on and clamped to the riiniljl. In the construction of the tool the numeral 13 designates a bandrorrstrap,relatively thin and of a width substantially'the same as 7 that of the rimll. Thebandorstrap 13 is bent into substantially 'circu'lar form and its endsare slightly spaced; apart; gA, lining 14: of friction material such as treated fabric or asbestos, ismounted-on the inner face of the band or strap 13 andxis secured thereto in any suitable manner such as by rivets 15 at 'intervalsjthroughout its length.-

The ends-of the-lininglet also are spaced apartslightly, vAn angular; lug 16 is mount ed on the outer face'ofone endportion of the band or strap 13 and the outwardly extending Portionoffsaid-lug is formed with a hole through which a clamping bolt A lug 17 is mounted rigidly onthe outer face of the opposite end portion oi the bandorstrap 13 and is fbl'lild with outstanding parallel rflanges i8, 19, which flanges are formed with two pairs ottransverseholes ,saidhols registering v in each pair, Ahandle 20 is formed with a; forl 21 and said forkextends within the space between the fianges 18., 19 and is pivotedat its extremityon rivets 22 mounted in one pair of registering holes in said A clamping bolt 23 is formed with aprismatic head 2% lying between the arms of theforlr 21 and said head is pivotedto" said fork by a rivet. 25' shown by dotted lines in Fig, 3; and 'said-boltis'fiattened slightly adjacent its head in orderthat it may pass freely the inner endsoi the rivets 22. The bolt 23 extends across the'fspace tion of the lug betweenthe lugs 16, 17', which space coin-f 'cideswith the space between ends of the band and-lining, and also extends-freely. through the hole in .theoutstanding por'f I tion of said bolt s, threaded to receive an adjusting nut 26. The handle 20is adapted to be oscillated on the rivets 22 and the axis of articulation between the head 24 and fork 21 is spaced radially fromthe axis of and nut 26 thereof are moved thereby longitudinally, thus applying. or releasing strain which results in approaching or separating the lugs 16, 17- relative to each other to the end of clamping or releasing the lining band or strap 13 relative to the rim 11 of theobject. The handle may be moved through clamping position into contact with a rivet 27 mounted on the outer part of holes in the flanges 18,19 as shown. In such" position the handle and bolt'23 are carried beyond the dead center so thatthe line of draft or strain falls between the rivets 22 and 27 and the rivet 27 serves as a stop for the handle, thus holding the parts in locked position. Forked handles 28, 29 are arranged diametricallyopposite each'other on and are fixed to the band or strap 13. The handles preferablyare arranged in alinement and in such relation to the band that a line through the centers of said handles would heat right angles to the diameter of the device intersecting the space between ends of the band. 2 Thus the handles 28, 29 are heldin convenient posi-' tion for the manipulation of the entire tool and fortheoccasio'nal and repeated manipur lation of the handle 20. The open position 7 of the handle and connected parts, together with slightly expanded relation of'the'lugs 16, 17 and end portions "of the band 1-3, are shown in dotted lines in -Fig. 1. When the tool is locked in positionl'n the object as shown, said object may leennoved and handled by means of thetool in any desired manner and'may be mounted and spun on afixed reamerin otgshown) extending through'the bushing12 tothe end of ream.

' day of January,

ing said bushing rapidly, conveniently and in a workmanlikemanner. When the clamp is released, as indicated by dotted lines' in Fig. 1, the tool maybe removed or applied to the object conveniently and rapidly and the relative arrangement of the handles 20, :28 and 29 lends itself to afacile adjustment of the clamping elements. 1

I claim as my invention- 1. A clamping tool, comprising a band of substantially annular form having spaced ends, handles on said band, a lining in said band adapted to engage fixedly the object embraced'by said band, a lug mounted rigidly on one end of said band and formed with a hole, a flanged lug on the other end of said band, a forked handle fulcrumed in said flanged lug, a bolt pivoted in the'fork of the handle and extending loosely through the hole in the first lug, and a. nut on said bolt adapted to engage the outer face of the first lug whereby the band may be ad-' justed to fit various objects orthe same object variously worn."

2. A clamping tool, comprising an integral one-piece band of substantially annular form having spaced ends, handles. on said band, a lining in said band adapted to engage fixedly the object embraced by said band, a lug on oneend of said band formed 1 with a hole, a flanged lug on the other end of said band, a forked handlefulcrumed in said flanged lug, a bolt formed with a prismatic head pivoted in the fork of the handle and extending loosely through the hole in the first lug, a rivet crossing the outer portion of said flanged lug for limiting oscillation of said handle beyond the dead center, and a nut on said bolt adapted to engage loosely the first lug whereby the band may be adjusted to fit various objects or the same object variously worn, and whereby said tool and the object may be manually rotated.

Signed at Pocahontas, in the county of Pocahontas and State of Iowa, this 23d GEORGE D. Lawson. 

